[CentOS] Ifconfig ipv6:permission denied.

dE de.techno at gmail.com
Sun Sep 21 15:19:04 UTC 2014


On 09/20/14 02:22, Marcelo Ricardo Leitner wrote:
> On 18-09-2014 13:57, James Hogarth wrote:
>> On 18 Sep 2014 09:07, "dE" <de.techno at gmail.com> wrote:
>>>
>>> On 09/17/14 21:03, Marcelo Ricardo Leitner wrote:
>>>>
>>>> One more test. Please check sysctl -a | grep disable_ipv6 output
>>>> And if it's =1, set it to 0.
>>>>
>>>> When NetworkManager is running, it may disable ipv6 on the 
>>>> interface if
>> its not configured via NM...
>>>>
>>> Yes, that was it. Thanks!!
>>>
>>> But this's the default? The installer should be checked for this.
>>>
>>
>> The default is not to disable ipv6 so something in your environment
>> actively did this.
>
> Well... NM needs to put the interface UP so it can reliably monitor 
> the link state. But that was turning ipv6 addr auto-config on and was 
> considered a security issue and thus NM started disabling ipv6 on such 
> (non-configured via NM but monitored) interface to avoid the address 
> auto-configuration from happening, yet causing this.
>
> The fix (to be able to bring it up without ipv6 address autoconfig) 
> needed kernel & NM patches and show be available on 7.0.z very soon.
>
>> This does, however, leave me somewhat confused as to how you claimed 
>> there
>> was a fc00::1001 address on there and you were adding the additional
>> address when you saw the refused message...
>
> Such address was on the host, no?
>
> Cheers,
> Marcelo
>
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Ok, NM IS installed. My bad, I didn't realize.



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